Improvement in turbine water-wheel



me eine.

JOSHUA E. CHAPMAN, or' WEST READING, ComIECTICU'r.-

Letters Patent No, 94,281, dated August 31, ,1869 antedated -ugus't 19, 1869.

*IMPRQVLMENT IN TURBINE WATER-WHEEL.

The Schedule referred to in these Letters Patent and making part of the same.

To all whonm't may concern:

Be it known that I, J osuUA E. CHAPMAN, of the town of West Reading, in the county ofllairield, and State of' Connecticut, have invented a new and irnproved Tater-Wheel; and Ido hereby declare that the following is a full and exact description of its construction andcperation, reference being had to the annexed drawings, and the letters of reference marked thereon, making a part of this specification.

Figure '1 is a sideelevation, and

Figure 2, a view of" the top,vwith a portion of one side left oii to show the form of' the buckets.

A is the helix or scroll, in common use with turbine wheels.

B is the'body of the water-wheel.

C is the shaft.`

D D are the buckets.

The dotted line a shows the inner and upper line of the water-chamber, or passage through the wheel B, and the dotted line b shows the outer and under line of the water-chamber to be seen as part of a crosssection through the' centre of the wheel B,

The dotted line a shows theline of the'bucket D, with its intersection to the wheel. B ou the inner side, and the line b shows the outer line of intersection, and as seen from a point-blank view of them.

` Now, the water from the helix or scroll A strikesV periphery without obstructing` its passage, then we' gain thegreatest amount of power from the water with the least resistance to it.

In the forni of the water-chamber in the wheel B and the buckets D D, we gain that power, as demonstrated by actual experiment, the water striking'the bucket D squarely atits base, and continuing in its rollingl motion to act centripctally on the bucket D through its whole length, while the form ofthe wheel B, having its discharge at the upper part 'of its periphery, the curve of the buckets D, and the motion given to the wheel B, each and all help and facilitate the free discharge of the water from the wheel.

`I claim the spiral form and arrangement of the buckets D, shaft C, curb'B, and conductor or forebay A, all as shown and described, for the purposes set forth.

JOSHUA E. CHAPMAN.

Witnesses:

MORGAN GHITTENDEN, LYMAN D.\BREWsTE1z. 

